CVE-2026-85591 phpMyFAQ before 4.1.8 Authentication Bypass via Unverified Password Change
Authenticated attackers can bypass password verification to change any user's password, leading to account takeover and potential privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-85591?
CVE-2026-85591 is a high-severity authentication bypass vulnerability in thorsten phpMyFAQ, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
phpMyFAQ versions before 4.1.8 contain an authentication bypass vulnerability in the user control panel API endpoint that allows authenticated attackers to change account passwords without verifying the current password. Attackers with session access can submit a PUT request to the user data update endpoint with only a CSRF token to silently change any user's password, including administrators, causing irreversible account takeover and victim lockout.
Weakness: CWE-620
Which versions are affected by CVE-2026-85591?
How do I fix CVE-2026-85591?
No fix has been published for CVE-2026-85591 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-85591 being exploited?
There is no known exploitation of CVE-2026-85591 in the wild and no public exploit code.
Sources
Also known as GHSA-6r2c-694w-24qv, GHSA-p8fc-6wpx-fw6r.